1 Nuclear dimensions 2 Nuclear size may be probed with scattering experiments, such as Rutherford's bombardment of a gold foil with alpha-particles which established the nuclear model of the atom, or electron scattering. Bombarding particles must have de Broglie wavelengths (given by p = h= ̧) smaller than the nuclear size of a few fm to actually probe the nuclear structure; this requires p ̧ 10¡...

The measurement of the energy loss of heavy ions in plasma is one of the research activities of the plasma physics group at GSI. In addition to the recent achievements [1] in the directly heated set-up where a carbon foil is irradiated by either one or two high energy lasers, nhelix and PHELIX, and probed by the ion beam the indirectly heated set-up has also made significant progress. In this s...

Based on last years field emission (FE) results achieved with randomly distributed free-standing gold nanowires (NW) [1], cathodes with regular arrays of Au-NW patches (50 μm diameter) were fabricated by means of a shadow mask during heavy ion irradiation of polycarbonate foils [2-3]. The number density, diameter Ø, and length L of the NW were controlled by the ion fluence f, foil etching time,...

Introduction: Grain size separate CG from the Murray CM2 carbonaceous chondrite contains mostly spinel grains of average diameter 0.5 μm [1]. Zinner et al. [2] found that approximately 1% of these spinel grains are of presolar origin as determined by their large O isotopic anomalies. These O isotopic measurements were made with the NanoSIMS on individual grains that were well separated from one...

We are reporting the results of studies on issues related to the injection stripping foil in the Spallation Neutron Source (SNS) accumulator ring. The problems related to foil heating and foil lifetime, such as current density distribution and temperature distribution in the foil, are investigated. The impact of injection errors on the beam losses at the foil is studied. The particle traversal ...

This study investigated the comprehensive characteristics of silver foil beads excavated from Tomb King Muryeong, based on composition analysis and glass morphological characterization. The major element components metal were using a scanning electron microscope (SEM) equipped with an Energy Dispersive X-ray spectrometer (EDS). Trace elements determined LA-ICP-MS to constrain source raw materia...

We present a description of the effect of the surface roughness on the energy straggling associated to the energy loss distributions of protons transmitted through a self supported metallic thin foil. For this purpose we prepared a polycrystalline gold thin films using the standard sputtering method with different deposition rates. The statistics of the surface height distribution induced in th...

Before 1909, atoms were thought to consist of a diffuse positive charge surrounded by electrons (the “plum pudding” model). In order to predict the properties of the elements on the periodic table with this model, the distribution of electrons on a sphere had to be studied. This problem was named after Thomson, the originator of the plum pudding model and the first to study it. In 1909, Rutherf...